Voice intercom unit



FIG. 1 is front perspective view of a voice intercom unit showing my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a side view thereof which is a mirror image of the opposite side thereof;

FIG. 6 is a front view thereof; and,

FIG. 7 is a rear view thereof.

The broken lines shown in the drawings form no part of the claimed design. 

The ornamental design for a voice intercom unit, as shown and described. 